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首页> 美国卫生研究院文献>Polymers >Waterborne Intumescent Coatings Containing Industrial and Bio-Fillers for Fire Protection of Timber Materials
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Waterborne Intumescent Coatings Containing Industrial and Bio-Fillers for Fire Protection of Timber Materials

机译：包含工业填料和生物填料的水性膨胀型涂料用于防火木材

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摘要

Flammability and combustion of softwood treated with intumescent coatings were studied in the present work. The formulations applied onto wood surfaces contained different ratios of industrial fillers, titanium dioxide TiO and aluminium trihydroxide Al(OH) , and/or bio-fillers, eggshell and rice husk ash. Combustion behaviours of unprotected and protected wood samples have been examined with the aid of cone calorimetry performed under the varied levels of thermal flux ranging from 30 to 50 kW/m². The char residues obtained after the completion of cone calorimetry test at 40 kW/m² were analysed by the Raman spectroscopy. The fire protective properties of the studied coatings were strongly influenced by the nature of the fillers as well as by the intensity of thermal irradiance. The incorporation of bio-based fillers into the water-based intumescent formulations significantly improved fire resistance of wood substrates. For example, at 30 kW/m², the Effective Heat of Combustion was reduced by more than 40%, whilst the average Peak to Heat Release Rate had dropped from 193.2 to 150.3 kW/m² for the wood sample protected with the formulation incorporating two industrial and two bio-fillers. Moreover, an application of the studied coatings resulted in a notable reduction of the back surface temperature of the wood specimens.
机译：在目前的工作中研究了用膨胀型涂料处理的软木的可燃性和燃烧性。应用于木材表面的配方包含不同比例的工业填料，二氧化钛TiO和三氢氧化铝Al（OH）和/或生物填料，蛋壳和稻壳灰。在30至50 kW /m²的不同热通量下，通过锥形量热法研究了未保护和受保护的木材样品的燃烧行为。通过拉曼光谱分析在40 kW /m²的锥形量热法测试完成后获得的焦炭残留物。所研究涂料的防火性能受填料性质和热辐照强度的强烈影响。将生物基填料掺入水基膨胀型配方中可显着提高木质基材的耐火性。例如，以30 kW /m²的有效燃烧效率降低了40％以上，而采用两个配方的配方保护的木材样品的平均峰热释放速率从193.2 kW /m²下降到150.3 kW /m²。和两个生物填充物。此外，所研究涂料的应用显着降低了木材样品的背面温度。

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